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Old 10-18-2015, 08:52 PM   #11
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Originally Posted by THE MEEKER View Post
us71na or anyone else, why should you not put antifreeze in the hot water tank?
Because the tank is a tank, flushing out the antfreeze takes a lot of water to insure you get it all out. Fluid in the tank mixes to some degree with the water coming in.

Still have doubts....Some time when you have nothing better to do, heat up the tank, turn off the heater and then see how many gallons you have to run through the tank before you get the same temperature water as is coming in from the city.
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Old 10-18-2015, 09:13 PM   #12
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I have been diluting three gallons of antifreeze with water in the fresh water tank for years and have yet to see any harm done. I have been told that if you do not have a hot water tank bypass that six gallons of antifreeze or the solution I make, is the minimum to ensure that the tank has antifreeze in it.

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Old 10-18-2015, 10:06 PM   #13
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I have been diluting three gallons of antifreeze with water in the fresh water tank for years and have yet to see any harm done. I have been told that if you do not have a hot water tank bypass that six gallons of antifreeze or the solution I make, is the minimum to ensure that the tank has antifreeze in it.

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Diluting may get you by in Seattle, but in colder climes (Minnesota, Canada, etc.) you never want to dilute the antifreeze.
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Old 10-18-2015, 10:25 PM   #14
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I understand, Flapper. It will never get to -50 here and the RV dealer owner that told me about diluting the antifreeze claims it is still good for -25 and we won't see that either.

Now those of you in the Midwest or the Great White Frozen North...

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Old 10-19-2015, 08:45 AM   #15
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Why fill the hot water tank with antifreeze during the winter when it's so easy to just empty it? If you empty it then any water remaining will not expand enough to hurt the tank.
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Old 10-19-2015, 11:05 AM   #16
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Putting antifreeze in the water heater, the fresh water tank, the grey tank and the black tank is a waste of time and antifreeze. Additionally by doing so you have added a lot of time and water ridding the water heater and the fresh water tank of that antifreeze.

The issue with freezing is the expansion. The only place this is an issue is in the water lines, the pump and P-traps. The holding tanks and water heater (drained, of course) have plenty of room for the expansion and will suffer no damage.
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Old 10-19-2015, 11:23 AM   #17
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We winterized for the first time yesterday, (only after perusing many a post here). I drained the water heater, flipped the bypass and blew out the lines with air. I thought I had done a good job. I was double checking a post on here and found one that stated to blow out the water heater too to get more out. So we did and ended up with what sounded like a large pocket of water within the heater. I ran the air for about 10 min and could hear it bubling thru the pocket. We got most of it out. We finished with running the antifreeze thru all the faucets, hot and cold, flushed the head, and poured some more in the p-traps.

Did I miss something with the water heater? Could I have done it different to get that final pocket out the first time?

Also, do you leave any antifreeze in the bowl of the toilet? I voted yes and the DW voted no. Can you guess who won?
suck it up and tell your DW that you win. let a cup or two of anti-freeze sit in the toilet bowl. That way your flush valve won't dryout.

BTW, I have never seen and staining from RV anti-freeze.
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Old 10-19-2015, 05:42 PM   #18
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Revisited the discussion armed with the gasket perspective. Antifreeze now floating in the bowl.

Decided that I got as much out of the W/H as was possible.

Should be no plumbing surprises come may.

Thanks guys.
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Old 10-19-2015, 07:11 PM   #19
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I have heard of some who stick a small clear hose in the bottom of the wh and siphon that little bit out. Only if you are anal about water.

It won't hurt anything if it freezes.
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Old 10-19-2015, 07:56 PM   #20
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ANGUS. I may have missed it but remember to put antifreeze in each of the P Traps and in the out side shower both hot and cold side.
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